A rectangle is drawn on a coordinate plane with vertices (0,0), (2,2), (9,−4), and (7,−6). Using the coordinates, what is the approximate area of the rectangle?(1 point)

Responses

25.76 units²
25.76 units²

52.2 units²
52.2 units²

12.05 units²
12.05 units²

24.1 units²

1 answer

To determine the area of the rectangle formed by the given vertices \((0,0)\), \((2,2)\), \((9,-4)\), and \((7,-6)\), we first need to ensure that these points indeed form a rectangle.

  1. Verify the vertices form a rectangle:

    • By examining the coordinates, we can check the slopes of the lines formed by the vertices.

    • The diagonal pairs are \((0,0)\) with \((9,-4)\) and \((2,2)\) with \((7,-6)\).

    • Calculate the distance between opposite points:

      • Distance between \((0,0)\) and \((9,-4)\): \[ d_1 = \sqrt{(9-0)^2 + (-4-0)^2} = \sqrt{9^2 + (-4)^2} = \sqrt{81 + 16} = \sqrt{97} \]

      • Distance between \((2,2)\) and \((7,-6)\): \[ d_2 = \sqrt{(7-2)^2 + (-6-2)^2} = \sqrt{5^2 + (-8)^2} = \sqrt{25 + 64} = \sqrt{89} \]

    • The areas are not equal, so this does not confirm a rectangle.

  2. Calculate the area using the shoelace formula: The shoelace formula (or surveyor's formula) for the area of a polygon given vertices \((x_1,y_1)\), \((x_2,y_2)\), \((x_3,y_3)\), \((x_4,y_4)\) is given by: \[ \text{Area} = \frac{1}{2} \left| x_1y_2 + x_2y_3 + x_3y_4 + x_4y_1 - (y_1x_2 + y_2x_3 + y_3x_4 + y_4x_1) \right| \]

    Using the vertices, we order them as: \[ (0,0), (2,2), (7,-6), (9,-4) \] Substituting into the shoelace formula:

    • \(x_1=0, y_1=0\)
    • \(x_2=2, y_2=2\)
    • \(x_3=9, y_3=-4\)
    • \(x_4=7, y_4=-6\)

    Now calculate: \[ \text{Area} = \frac{1}{2} \left| 0\cdot2 + 2\cdot(-4) + 9\cdot(-6) + 7\cdot0 - (0\cdot2 + 2\cdot9 + (-4)\cdot7 + (-6)\cdot0) \right| \]

    Calculate each term:

    • \(0 + (-8) + (-54) + 0 = -62\)
    • \(0 + 18 + (-28) + 0 = -10\)

    Put it together: \[ \text{Area} = \frac{1}{2} \left| -62 + 10 \right| = \frac{1}{2} \left| -52 \right| = \frac{52}{2} = 26\text{ units}^2 \]

Given the options provided, the closest response is:

  • 25.76 units²

Hence, the approximate area of the rectangle is 25.76 units².